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WO2017134927A1 - Terminal et procédé d'émission - Google Patents

Terminal et procédé d'émission Download PDF

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Publication number
WO2017134927A1
WO2017134927A1 PCT/JP2016/086556 JP2016086556W WO2017134927A1 WO 2017134927 A1 WO2017134927 A1 WO 2017134927A1 JP 2016086556 W JP2016086556 W JP 2016086556W WO 2017134927 A1 WO2017134927 A1 WO 2017134927A1
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WO
WIPO (PCT)
Prior art keywords
terminal
signal
unit
dmrs
repetition
Prior art date
Application number
PCT/JP2016/086556
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English (en)
Japanese (ja)
Inventor
哲矢 山本
綾子 堀内
Original Assignee
パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to MX2018007853A priority Critical patent/MX2018007853A/es
Priority to CN201680075107.XA priority patent/CN108432197B/zh
Priority to KR1020187015245A priority patent/KR20180113189A/ko
Priority to EP16889410.3A priority patent/EP3413526B1/fr
Application filed by パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ filed Critical パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Priority to RU2018124596A priority patent/RU2719359C2/ru
Priority to SG11201805145TA priority patent/SG11201805145TA/en
Priority to JP2017565415A priority patent/JP6640883B2/ja
Priority to US16/064,971 priority patent/US10924234B2/en
Priority to EP21179888.9A priority patent/EP3907952B1/fr
Priority to BR112018013459-7A priority patent/BR112018013459B1/pt
Publication of WO2017134927A1 publication Critical patent/WO2017134927A1/fr
Priority to US17/145,811 priority patent/US11533210B2/en
Priority to US17/990,422 priority patent/US11665039B2/en
Priority to US18/302,584 priority patent/US12015512B2/en
Priority to US18/662,551 priority patent/US20240297812A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26132—Structure of the reference signals using repetition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/0013—Rate matching, e.g. puncturing or repetition of code symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
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    • H04L25/00—Baseband systems
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    • H04L25/0202—Channel estimation
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    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H—ELECTRICITY
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
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    • H—ELECTRICITY
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    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
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    • H—ELECTRICITY
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    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
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    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04L5/00—Arrangements affording multiple use of the transmission path
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    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
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    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
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    • H—ELECTRICITY
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    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals

Definitions

  • This disclosure relates to a terminal and a transmission method.
  • M2M Machine-to-Machine
  • a smart grid is a specific application example of the M2M system.
  • the smart grid is an infrastructure system that efficiently supplies a lifeline such as electricity or gas.
  • the smart grid performs M2M communication between a smart meter deployed in each home or building and a central server to autonomously and effectively adjust the resource demand balance.
  • Other application examples of the M2M communication system include a monitoring system for goods management, environmental sensing or telemedicine, and remote management of vending machine inventory or billing.
  • NB-IoT Narrow Band-Internet of Things
  • Coverage Enhancement unlike a handset terminal that a user often uses while moving, ensuring a coverage is an absolutely necessary condition for providing a service in a terminal such as a smart meter that hardly moves.
  • the communication area is further expanded in order to cope with a case where a terminal corresponding to a location that cannot be used in a communication area of an existing cellular network (for example, LTE and LTE-Advanced) such as a basement of a building is arranged.
  • an existing cellular network for example, LTE and LTE-Advanced
  • Crossage extension is an important consideration.
  • the existing LTE resource block is composed of 12 subcarriers
  • the communication area is reduced while reducing the power consumption of the terminal (hereinafter also referred to as the NB-IoT terminal).
  • the terminal supports transmission on subcarrier counts less than 12 (eg, 1, 3, and 6 subcarriers). Since the terminal performs transmission with a small number of subcarriers (that is, transmission by narrowing the band), the power spectrum density increases, so that reception sensitivity can be improved and coverage can be expanded.
  • resource elements that can be allocated to a terminal at a time when resources are allocated to the terminal for each subframe which is a time unit of an existing LTE resource block (RE: Resource Element)
  • NB-IoT increases the number of subframes that can be allocated according to the number of transmission subcarriers in order to maintain the number of REs that can be allocated to a terminal at the same time as the existing LTE. For example, when a terminal transmits on 1 subcarrier, 8 subframes are transmitted. When a terminal transmits on 3 subcarriers, 4 subframes are transmitted. When a terminal transmits on 6 subcarriers, 2 subframes are transmitted once. It is assumed that the unit of resources to be allocated to (hereinafter referred to as scheduling unit or resource unit).
  • NB-IoT a coverage extension of about 20 dB at the maximum is required compared to the LTE communication area.
  • the transmission by subcarriers smaller than 12 subcarriers as described above for example, when the terminal transmits with M subcarriers, theoretically, 10 log 10 (12 / M) compared with the case of transmission with 12 subcarriers. It can be expected to improve the dB coverage.
  • the coverage can be improved by about 11 dB at the maximum as compared with LTE 12 subcarrier transmission.
  • An example of a technique for improving channel estimation accuracy is “multiple subframe channel estimation and symbol level synthesis” (see, for example, Non-Patent Document 5).
  • the base station performs the same number of repetitions for a signal transmitted by repetition over multiple subframes (R subframes). In-phase synthesis is performed in symbol units over the subframes or subframes (X subframes) smaller than the number of repetitions. Thereafter, the base station performs channel estimation using DMRS after in-phase combining, and demodulates and decodes SC-FDMA data symbols using the obtained channel estimation result.
  • the base station uses the demodulated and decoded (R / X) symbols. Synthesize.
  • the PUSCH transmission quality can be improved compared to simple repetition in which channel estimation and SC-FDMA data symbols are demodulated and decoded in units of subframes (for example, Non-patent document 5).
  • 3GPP TS 36.211 V13.0.0 “Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels channels and modulation 13 (Release 13),“ December 2015.
  • 3GPP TS 36.212 V13.0.0 “Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding (Release 13),“ December 2015.
  • 3GPP TS 36.213 V13.0.0 “Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 13),” December 2015.
  • One aspect of the present disclosure provides a terminal and a transmission method that can improve the transmission quality for an NB-IoT terminal while minimizing the influence on an existing LTE system.
  • a terminal includes a repetition unit that performs repetition for mapping in units of symbols over a plurality of subframes with respect to a data signal and a demodulation reference signal (DMRS);
  • the repeated DMRS is mapped to a symbol other than a symbol corresponding to an SRS resource candidate that is a resource candidate to which a sounding reference signal (SRS) used for measurement of uplink reception quality is mapped.
  • SRS sounding reference signal
  • FIG. 3 is a block diagram showing a main configuration of a terminal according to Embodiment 1.
  • FIG. 3 is a block diagram showing a main configuration of a terminal according to Embodiment 1.
  • FIG. 2 is a block diagram showing a configuration of a base station according to Embodiment 1 A block diagram showing a configuration of a terminal according to the first embodiment
  • OFDMA Orthogonal Frequency Frequency Division
  • UE User Equipment
  • Multiple-Access is employed
  • SC-FDMA Single Carrier-Frequency-Division-Multiple Access
  • FIG. 1 shows an example of subframe configuration in an LTE uplink shared channel (PUSCH: Physical Uplink Shared Channel).
  • PUSCH Physical Uplink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • DMRS Demodulation Reference Signal
  • the base station receives the PUSCH, the base station performs channel estimation using DMRS. Thereafter, the base station demodulates and decodes the SC-FDMA data symbol using the channel estimation result.
  • SRS Sounding Reference Signal
  • the SRS is mapped to the SRS resource and transmitted from the terminal to the base station.
  • the base station sets up an SRS resource candidate group including SRS resource candidates common to all terminals existing in the target cell by cell-specific higher layer notification.
  • the SRS resource that is a subset of the SRS resource candidate group is allocated to the terminal to which the SRS resource is allocated by the upper layer notification in units of terminals.
  • the terminal maps the SRS to the allocated SRS resource and transmits it to the base station.
  • Each SRS resource candidate is a final symbol in a subframe (SRS transmission candidate subframe) that is an SRS transmission candidate.
  • SRS transmission candidate subframe a subframe that is an SRS transmission candidate.
  • PUSCH signal the data signal
  • srs-SubframeConfig In LTE, srs-SubframeConfig or the like is defined as a cell-specific upper layer notification for setting an SRS resource candidate group (see, for example, Non-Patent Document 1).
  • FIG. 2 shows an example of the definition of srs-SubframeConfig. Any of the srs-SubframeConfig numbers (0 to 15) shown in FIG. 2 is transmitted from the base station to the terminal. Thereby, the transmission interval (T SFC ) for transmitting the SRS and the offset amount ( ⁇ SFC ) for indicating the subframe for starting the transmission of the SRS are instructed from the base station to the terminal. For example, in FIG.
  • a terminal transmits the number of subcarriers less than 12 subcarriers and the number of subframes greater than one subframe as one resource allocation unit (resource unit). Furthermore, in order to improve the coverage, a repetition of repeatedly transmitting the same signal multiple times is applied. That is, in the time domain, if the number of subframes per resource unit is X and the number of repetitions is R, (X ⁇ R) subframes are used for transmission.
  • the following three methods can be considered as a method of repeating a resource unit multiple times.
  • the first is a repetition for each resource unit.
  • the second is repetition in subframe units.
  • the terminal transmits subframe signals including the same signal in the resource unit in successive subframes.
  • the above-described symbols are less affected by frequency errors compared to repetition in resource units. Easy to apply level synthesis.
  • the third is a symbol unit repetition.
  • the terminal transmits SC-FDMA (Single-Carrier-Frequency-Division-Multiple-Access) symbols including the same signal in the resource unit as consecutive symbols.
  • symbol-by-symbol repetition symbols containing the same signal are transmitted continuously, making it less susceptible to frequency errors compared to sub-frame-by-subframe repetition, and improving the coverage by symbol-level synthesis. growing.
  • NB-IoT defines three operation modes, “Standalone mode” using GSM (registered trademark) (Global System for mobile communications) frequency band, another system using adjacent frequency band in LTE There is a “Guard-band mode” using an unused frequency band provided to prevent interference with the wireless LAN and an “In-band mode” using a part of the existing LTE frequency band.
  • GSM registered trademark
  • GSM Global System for mobile communications
  • the first method is a method of puncturing the final symbol after mapping data to 12SC-FDMA symbols excluding DMRS as in other subframes as shown in FIG. 6).
  • the second method is a method for mapping data to 11SC-FDMA symbols excluding the final symbol by changing the coding rate for data from other subframes as a format for transmitting data in SRS transmission candidate subframes. (Rate matching) (see, for example, Non-Patent Document 7).
  • Both of the above-described two methods are based on the assumption that the existing LTE PUSCH subframe configuration as shown in FIG. 1, that is, the final symbol of one subframe consisting of 14 symbols is necessarily a data symbol.
  • the existing LTE PUSCH subframe configuration can be maintained. Collision with the existing LTE SRS can be avoided by puncturing the last symbol of one subframe or rate matching. However, the effect of symbol level synthesis cannot be sufficiently obtained by repetition in resource units and repetition in subframes.
  • the final symbol of one subframe consisting of 14 symbols is not necessarily a data symbol.
  • the final symbol of the first and third subframes is DMRS. Therefore, when these subframes are SRS transmission candidate subframes, the NB-IoT terminal must puncture the DMRS mapped to the final symbol in the same manner as the existing LTE. Since DMRS is not encoded like data, Rate matching cannot be applied to DMRS.
  • uplink transmission of NB-IoT terminals that perform repetition transmission in symbol units and SRS transmission of existing LTE terminals Minimize the impact of collision (DMRS puncturing in SRS transmission candidate subframes).
  • the base station in the demodulation of the signal from the NB-IoT terminal, the base station can improve channel estimation accuracy and reception quality by performing channel estimation and symbol level synthesis using a sufficient number of DMRS symbols.
  • the communication system includes a base station 100 and a terminal 200.
  • the terminal 200 is, for example, an NB-IoT terminal.
  • an environment in which an NB-IoT terminal (terminal 200) and an existing LTE terminal coexist is assumed.
  • FIG. 8 is a block diagram illustrating a main configuration of the terminal 200 according to each embodiment of the present disclosure.
  • repetition section 212 repeats a data signal and a demodulation reference signal (DMRS) over a plurality of subframes in symbol units
  • signal allocation section 213 includes a plurality of subframes.
  • the repeated DMRS is mapped to a symbol other than a symbol corresponding to an SRS resource candidate that is a resource candidate to which a sounding reference signal (SRS) used for measurement of uplink reception quality is mapped
  • a transmission section 216 Transmits uplink signals (PUSCH) including DMRS and data signals in a plurality of subframes.
  • PUSCH uplink signals
  • FIG. 9 is a block diagram illustrating a configuration of base station 100 according to Embodiment 1 of the present disclosure.
  • the base station 100 includes a control unit 101, a control signal generation unit 102, an encoding unit 103, a modulation unit 104, a signal allocation unit 105, an IFFT (Inverse Fast Fourier Transform) unit 106, and a CP.
  • a control unit 101 a control signal generation unit 102
  • an encoding unit 103 a modulation unit 104
  • a signal allocation unit 105 a signal allocation unit 105
  • an IFFT Inverse Fast Fourier Transform
  • the control unit 101 determines the SRS resource candidate group in the cell in consideration of the amount of SRS resources necessary for each of a plurality of terminals (existing LTE terminals) existing in the cell covered by the base station 100.
  • Information indicating the SRS resource candidate group is output to the control signal generation unit 102 and the synthesis unit 113.
  • the SRS resource candidate group is selected from, for example, the table shown in FIG.
  • control unit 101 outputs information regarding mapping of DMRS and data to SC-FDMA symbols when the NB-IoT terminal (terminal 200) performs repetition transmission to the combining unit 113 and the demapping unit 114.
  • control unit 101 determines PUSCH allocation to the NB-IoT terminal. At this time, the control unit 101 determines a frequency allocation resource and a modulation / coding method to be instructed to the NB-IoT terminal, and outputs information on the determined parameter to the control signal generation unit 102.
  • control unit 101 determines the encoding level for the control signal, and outputs the determined encoding level to the encoding unit 103. In addition, the control unit 101 determines a radio resource (downlink resource) to which the control signal is mapped, and outputs information on the determined radio resource to the signal allocation unit 105.
  • a radio resource downlink resource
  • control unit 101 determines the coverage extension level of the NB-IoT terminal, and determines the information related to the determined coverage extension level or the number of repetitions required for PUSCH transmission at the determined coverage extension level. To 102. In addition, the control unit 101 generates information on the number of subcarriers used by the NB-IoT terminal for PUSCH transmission, and outputs the generated information to the control signal generation unit 102.
  • the control signal generation unit 102 generates a control signal for the NB-IoT terminal.
  • the control signal includes a cell-specific upper layer signal, a terminal-specific upper layer signal, or an uplink grant instructing PUSCH allocation.
  • the uplink grant is composed of a plurality of bits, and includes information indicating a frequency allocation resource, a modulation / coding scheme, and the like. Further, the uplink grant may include information on the coverage extension level, the number of repetitions required for PUSCH transmission, and information on the number of subcarriers used by the NB-IoT terminal for PUSCH transmission.
  • the control signal generation unit 102 generates a control information bit string using the control information input from the control unit 101, and outputs the generated control information bit string (control signal) to the encoding unit 103. Since the control information may be transmitted for a plurality of NB-IoT terminals, the control signal generation unit 102 includes the terminal ID of each NB-IoT terminal in the control information for each NB-IoT terminal. Generate a bit string. For example, a CRC (Cyclic Redundancy Check) bit masked by the terminal ID of the destination terminal is added to the control information.
  • CRC Cyclic Redundancy Check
  • the information on the SRS resource candidate group is notified to the NB-IoT terminal (a control unit 206 described later) by a cell-specific upper layer signal.
  • Information on frequency allocation resources, information indicating modulation / coding schemes, information on coverage extension levels or the number of repetitions required for PUSCH transmission, and information on the number of subcarriers used for PUSCH transmission by NB-IoT terminals are terminal-specific. It may be notified to the NB-IoT terminal by higher layer signaling, or may be notified using an uplink grant instructing PUSCH allocation as described above.
  • the encoding unit 103 encodes the control signal (control information bit string) received from the control signal generation unit 102 according to the encoding level instructed by the control unit 101, and outputs the encoded control signal to the modulation unit 104.
  • Modulation section 104 modulates the control signal received from encoding section 103 and outputs the modulated control signal (symbol sequence) to signal allocation section 105.
  • the signal allocation unit 105 maps the control signal (symbol sequence) received from the modulation unit 104 to a radio resource instructed by the control unit 101.
  • the control channel to which the control signal is mapped is a downlink control channel for NB-IoT.
  • the signal allocation unit 105 outputs a downlink subframe signal including a downlink control channel for NB-IoT to which the control signal is mapped to the IFFT unit 106.
  • the IFFT unit 106 converts the frequency domain signal into a time domain signal by performing IFFT processing on the signal received from the signal allocation unit 105.
  • IFFT section 106 outputs the time domain signal to CP adding section 107.
  • CP adding section 107 adds a CP to the signal received from IFFT section 106, and outputs the signal after the CP addition (OFDM signal) to transmitting section 108.
  • the transmission unit 108 performs RF (Radio-Frequency) processing such as D / A (Digital-to-Analog) conversion and up-conversion on the OFDM signal received from the CP addition unit 107, and the NB-IoT terminal via the antenna 109 A radio signal is transmitted to (terminal 200).
  • RF Radio-Frequency
  • the reception unit 110 is obtained by performing RF processing such as down-conversion or A / D (Analog-to-Digital) conversion on the uplink signal (PUSCH) received from the terminal 200 via the antenna 109.
  • the received signal is output to CP removing section 111.
  • the uplink signal (PUSCH) transmitted from terminal 200 includes a signal subjected to repetition processing over a plurality of subframes.
  • the CP removal unit 111 removes the CP added to the reception signal received from the reception unit 110 and outputs the signal after the CP removal to the FFT unit 112.
  • the FFT unit 112 applies FFT processing to the signal received from the CP removal unit 111, decomposes it into a frequency domain signal sequence, extracts a signal corresponding to a PUSCH subframe, and combines the extracted PUSCH signal into a synthesis unit It outputs to 113.
  • the combining unit 113 receives information about the SRS resource candidate group input from the control unit 101, and information about PUSCH repetition transmission of the NB-IoT terminal (number of repetitions and DMRS when the NB-IoT terminal transmits repetition) And information on mapping of data to SC-FDMA symbols), and PUSCH over multiple subframes transmitted by repetition, using symbol level synthesis, a signal corresponding to a data signal and a DMRS In-phase synthesis.
  • the combining unit 113 outputs the combined signal to the demapping unit 114.
  • the demapping unit 114 extracts the PUSCH subframe signal from the signal received from the synthesis unit 113. Then, the demapping unit 114 uses the information related to PUSCH repetition transmission of the NB-IoT terminal, which is input from the control unit 101, to extract the signal of the extracted PUSCH subframe part, the SC-FDMA data symbol, the DMRS, The DMRS is output to the channel estimator 115, and the SC-FDMA data symbol is output to the equalizer 116.
  • the channel estimation unit 115 performs channel estimation using DMRS input from the demapping unit 114.
  • Channel estimation section 115 outputs the obtained channel estimation value to equalization section 116.
  • the equalization unit 116 equalizes the SC-FDMA data symbol input from the demapping unit 114 using the channel estimation value input from the channel estimation unit 115. Equalization section 116 outputs the SC-FDMA data symbols after equalization to demodulation section 117.
  • the demodulating unit 117 applies IDFT (Inverse Decrete Fourier Transform) to the frequency domain SC-FDMA data symbol input from the equalizing unit 116, converts it to a time domain signal, and performs data demodulation. Specifically, the demodulation unit 117 converts the symbol sequence into a bit sequence based on the modulation scheme instructed to the NB-IoT terminal, and outputs the obtained bit sequence to the decoding unit 118.
  • IDFT Inverse Decrete Fourier Transform
  • the decoding unit 118 performs error correction decoding on the bit sequence input from the demodulation unit 117, and outputs the decoded bit sequence to the determination unit 119.
  • the determination unit 119 performs error detection on the bit sequence input from the decoding unit 118.
  • the determination unit 119 performs error detection using the CRC bits added to the bit sequence. If there is no error in the CRC bit determination result, determination section 119 extracts the received data and notifies control section 101 of ACK. On the other hand, if the CRC bit determination result has an error, the determination unit 119 notifies the control unit 101 of NACK.
  • FIG. 10 is a block diagram showing a configuration of terminal 200 according to Embodiment 1 of the present disclosure.
  • terminal 200 includes an antenna 201, a receiving unit 202, a CP removing unit 203, an FFT unit 204, a control signal extracting unit 205, a control unit 206, an encoding unit 207, and a modulating unit 208.
  • the receiving unit 202 receives a control signal (NB-IoT downlink control channel) transmitted from the base station 100 via the antenna 201, and performs RF processing such as down-conversion or AD conversion on the radio reception signal. To obtain a baseband OFDM signal.
  • Receiving section 202 outputs the OFDM signal to CP removing section 203.
  • CP removing section 203 removes the CP added to the OFDM signal received from receiving section 202, and outputs the signal after the CP removal to FFT section 204.
  • the FFT unit 204 converts the time domain signal into a frequency domain signal by performing an FFT process on the signal received from the CP removal unit 203.
  • the FFT unit 204 outputs the frequency domain signal to the control signal extraction unit 205.
  • the control signal extraction unit 205 performs blind decoding on the frequency domain signal (NB-IoT downlink control channel) received from the FFT unit 204 and attempts to decode the control signal addressed to itself. A CRC masked with the terminal ID of the NB-IoT terminal is added to the control signal addressed to the terminal 200. Therefore, if the CRC determination is OK as a result of the blind decoding, the control signal extraction unit 205 extracts the control information and outputs it to the control unit 206.
  • NB-IoT downlink control channel the frequency domain signal
  • the control unit 206 controls PUSCH transmission based on the control signal input from the control signal extraction unit 205.
  • control unit 206 instructs the signal allocation unit 213 to perform resource allocation during PUSCH transmission based on PUSCH resource allocation information included in the control signal.
  • control unit 206 instructs the encoding unit 207 and the modulation unit 208 on the encoding method and the modulation method at the time of PUSCH transmission based on the information on the encoding method and the modulation method included in the control signal.
  • control signal includes information on the coverage extension level or information on the number of repetitions necessary for PUSCH transmission in the control signal
  • control unit 206 determines the number of repetitions at the time of PUSCH repetition transmission based on the information, Information indicating the determined number of repetitions is instructed to the repetition unit 212.
  • control unit 206 determines the number of subcarriers during PUSCH transmission and subframes per resource unit based on the information.
  • the number X is instructed to the signal allocation unit 213.
  • control unit 206 is notified when information on the coverage extension level, information on the number of repetitions necessary for PUSCH transmission, or information on the coding scheme and modulation scheme is notified from the base station 100 in the upper layer. Based on the information, the number of repetitions at the time of PUSCH repetition transmission, or the encoding method and modulation method are determined, and the determined information is instructed to the repetition unit 212, or the encoding unit 207 and the modulation unit 208. Similarly, when information related to the number of subcarriers used by the NB-IoT terminal for PUSCH transmission is notified from the base station 100 in the upper layer, the control unit 206 determines the number of subcarriers during PUSCH transmission based on the notified information. And the signal allocation unit 213 is instructed about the number of subframes X per resource unit.
  • control unit 206 outputs information on the SRS resource candidate group notified from the base station 100 in the cell-specific upper layer to the signal allocation unit 213.
  • control unit 206 outputs, to the multiplexing unit 210, the repetition unit 212, and the signal allocation unit 213, information related to mapping of DMRS and data to SC-FDMA symbols when the NB-IoT terminal performs repetition transmission. .
  • the encoding unit 207 adds a CRC bit masked with the terminal ID to the input transmission data, performs error correction encoding using the encoding method instructed by the control unit 206, and performs the encoded bits.
  • the sequence is output to modulation section 208.
  • Modulation section 208 modulates the bit sequence received from encoding section 207 based on the modulation scheme instructed from control section 206, and outputs the modulated data symbol sequence to multiplexing section 210.
  • the DMRS generating unit 209 generates a DMRS and outputs the generated DMRS to the multiplexing unit 210.
  • the multiplexing unit 210 multiplexes the data symbol sequence received from the modulation unit 208 and the DMRS received from the DMRS generation unit 209 based on information regarding mapping of DMRS and data to SC-FDMA symbols input from the control unit 206.
  • the multiplexed signal is output to the DFT unit 211.
  • the DFT unit 211 applies a DFT to the signal input from the multiplexing unit 210 to generate a frequency domain signal and outputs it to the repetition unit 212.
  • the repetition unit 212 repeats the signal input from the DFT unit 211 over a plurality of subframes based on the number of repetitions instructed from the control unit 206 when the terminal is in the coverage extension mode. Generate a tension signal.
  • the repetition unit 212 outputs a repetition signal to the signal allocation unit 213.
  • the signal allocation unit 213 maps the signal received from the repetition unit 212 to the PUSCH time / frequency resources allocated in accordance with the instruction from the control unit 206. Further, the signal allocation unit 213 punctures the signal mapped to the symbol corresponding to the SRS resource candidate of the SRS transmission candidate subframe based on the information regarding the SRS resource candidate group received from the control unit 206. The signal allocation unit 213 outputs the PUSCH signal to which the signal is mapped to the IFFT unit 214.
  • the IFFT unit 214 generates a time domain signal by performing IFFT processing on the frequency domain PUSCH signal input from the signal allocation unit 213.
  • IFFT section 214 outputs the generated signal to CP adding section 215.
  • CP adding section 215 adds a CP to the time domain signal received from IFFT section 214, and outputs the signal after the CP addition to transmitting section 216.
  • the transmitting unit 216 performs RF processing such as D / A conversion and up-conversion on the signal received from the CP adding unit 215, and transmits a radio signal to the base station 100 via the antenna 201.
  • the base station 100 notifies the terminal 200 of srs-SubframeConfig as a cell-specific upper layer notification for setting an SRS resource candidate group.
  • the base station 100 performs communication by assigning resource units in the band for NB-IoT to the terminal 200 that is an NB-IoT terminal.
  • the base station 100 determines PUSCH allocation to the NB-IoT terminal.
  • the PUSCH allocation information includes frequency allocation resource information for instructing the NB-IoT terminal, information on the coding scheme and modulation scheme, and the like.
  • the PUSCH allocation information may be notified from the base station 100 to the terminal 200 via a terminal-specific upper layer, or may be notified using a downlink control channel for NB-IoT.
  • the base station 100 notifies the NB-IoT terminal in advance of the repetition count (R) before PUSCH transmission / reception.
  • the repetition count (R) may be notified from the base station 100 to the terminal 200 via a terminal-specific upper layer, or may be notified using a downlink control channel for NB-IoT.
  • the base station 100 notifies the NB-IoT terminal in advance of the number of transmission subcarriers (for example, 1, 3, 6, 12 subcarriers) used by the NB-IoT terminal for PUSCH transmission before PUSCH transmission / reception. .
  • the number of transmission subcarriers may be notified from the base station 100 to the terminal 200 via a higher layer unique to the terminal, or may be notified using a downlink control channel for NB-IoT.
  • the terminal 200 transmits PUSCH for repetition for the number of repetitions (R) notified from the base station 100. Therefore, terminal 200 transmits PUSCH over (X ⁇ R) subframes. For example, if the number of SC-FDMA symbols per subframe is 14 symbols, which is the same as in the existing LTE system, (14 ⁇ X ⁇ R) SC-FDMA symbols are included in (X ⁇ R) subframes. included.
  • the terminal 200 transmits PUSCH using a symbol unit repetition.
  • terminal 200 continuously maps all DMRSs included in the repetition signal (PUSCH signal) from the first symbol of a plurality of subframes for which PUSCH repetition is performed. Specifically, terminal 200 maps DMRSs continuously over 2R symbols from the beginning of a subframe in which PUSCH repetition is performed.
  • the terminal 200 may perform DMRS repetition of 2R symbols at the R subframe period.
  • DMRS is one subframe at terminal 200. There is no mapping to the final symbol (the 14th symbol from the beginning). That is, terminal 200 maps DMRS to SC-FDMA symbols other than the final symbol of one subframe (SRS transmission candidate subframe) in which an existing LTE terminal may transmit SRS.
  • the terminal 200 identifies the SRS transmission candidate subframe based on the srs-SubframeConfig notified from the base station 100.
  • Terminal 200 punctures the final symbol of the 14SC-FDMA symbol in the SRS transmission candidate subframe.
  • DMRS is not mapped to the final symbol of one subframe. That is, a data symbol is always mapped to the final symbol of the SRS transmission candidate subframe. Therefore, terminal 200 punctures data symbols, not DMRS, in the final symbol of the SRS transmission candidate subframe.
  • the terminal 200 that is an NB-IoT terminal performs PUSCH repetition in symbol units
  • the SC-FDMA symbol (SRS transmission) corresponding to the SRS resource candidate that the LTE terminal may transmit the SRS.
  • DMRS is mapped to SC-FDMA symbols other than the final symbol of the candidate subframe.
  • the base station 100 demodulates the data signal using DMRS included in the PUSCH transmitted from the terminal 200.
  • DMRS is not punctured in the NB-IoT terminal. Therefore, the base station 100 can perform channel estimation and symbol level synthesis using a sufficient number of DMRS symbols for the received PUSCH.
  • the base station 100 can perform symbol level synthesis using double DMRS. Therefore, according to the present embodiment, base station 100 can improve channel estimation accuracy.
  • the base station 100 can accurately perform frequency error estimation or timing detection.
  • the DMRS is avoided from being punctured by controlling the DMRS mapping in the NB-IoT terminal. That is, according to the present embodiment, it is not necessary for base station 100 to change the setting of the SRS subframe with respect to the existing LTE system.
  • base station and terminal according to the present embodiment have the same basic configuration as base station 100 and terminal 200 according to Embodiment 1, and will be described with reference to FIGS. 9 and 10.
  • the base station 100 notifies the terminal 200 of srs-SubframeConfig as a cell-specific upper layer notification for setting an SRS resource candidate group.
  • the base station 100 performs communication by assigning resource units in the band for NB-IoT to the terminal 200 that is an NB-IoT terminal.
  • the base station 100 determines PUSCH allocation to the NB-IoT terminal.
  • the PUSCH allocation information includes frequency allocation resource information for instructing the NB-IoT terminal, information on the coding scheme and modulation scheme, and the like.
  • the PUSCH allocation information may be notified from the base station 100 to the terminal 200 via a terminal-specific upper layer, or may be notified using a downlink control channel for NB-IoT.
  • the base station 100 notifies the NB-IoT terminal in advance of the repetition count (R) before PUSCH transmission / reception.
  • the repetition count (R) may be notified from the base station 100 to the terminal 200 via a terminal-specific upper layer, or may be notified using a downlink control channel for NB-IoT.
  • the base station 100 notifies the NB-IoT terminal in advance of the number of transmission subcarriers (for example, 1, 3, 6, 12 subcarriers) used by the NB-IoT terminal for PUSCH transmission before PUSCH transmission / reception. .
  • the number of transmission subcarriers may be notified from the base station 100 to the terminal 200 via a higher layer unique to the terminal, or may be notified using a downlink control channel for NB-IoT.
  • the base station 100 determines the DMRS division number (N) for the NB-IoT terminal or the symbol repetition number (R ′) indicating the number of DMRS symbols to be transmitted continuously.
  • the number of DMRS divisions (N) or the number of symbol repetitions (R ′) may be reported from the base station 100 to the terminal 200 via a terminal-specific upper layer, and a downlink control channel for NB-IoT You may be notified using.
  • the DMRS division number (N) or the symbol repetition number (R ′) may be a parameter that is predetermined in the standard.
  • the terminal 200 transmits PUSCH for repetition for the number of repetitions (R) notified from the base station 100. Therefore, terminal 200 transmits PUSCH over (X ⁇ R) subframes. For example, if the number of SC-FDMA symbols per subframe is 14 symbols, which is the same as in the existing LTE system, (14 ⁇ X ⁇ R) SC-FDMA symbols are included in (X ⁇ R) subframes. included.
  • the terminal 200 transmits PUSCH using a symbol unit repetition.
  • terminal 200 maps a plurality of DMRSs included in the repetition signal (PUSCH signal) in a distributed manner (divided into N groups) for each predetermined number (R ′) of consecutive symbols.
  • terminal 200 performs DMRS mapping (DMRS repetition) with consecutive (2R / N) symbols in the R / N subframe period from the beginning of a plurality of subframes in which PUSCH repetition is performed.
  • terminal 200 continuously maps DMRS from the first symbol of a plurality of subframes for which PUSCH repetition is performed over (2R / N) symbols, and thereafter (2R / N) subframe periods (2R / N).
  • N) Perform DMRS mapping across symbols.
  • the terminal 200 continuously maps DMRS over the R ′ symbol at the beginning of the subframe of the PUSCH repetition, and thereafter maps DMRS over the R ′ symbol in the (R ′ / 2) subframe period. I do.
  • DMRS is not mapped to the final symbol of one subframe in terminal 200. That is, terminal 200 maps DMRS to SC-FDMA symbols other than the final symbol of one subframe (SRS transmission candidate subframe) in which an existing LTE terminal may transmit SRS.
  • the terminal 200 identifies the SRS transmission candidate subframe based on the srs-SubframeConfig notified from the base station 100.
  • Terminal 200 punctures the final symbol of the 14SC-FDMA symbol in the SRS transmission candidate subframe.
  • DMRS is not mapped to the final symbol of one subframe. That is, a data symbol is always mapped to the final symbol of the SRS transmission candidate subframe. Therefore, terminal 200 punctures data symbols, not DMRS, in the final symbol of the SRS transmission candidate subframe.
  • terminal 200 which is an NB-IoT terminal, corresponds to SRS resource candidates for which an LTE terminal may transmit SRS, as in Embodiment 1, when performing PUSCH repetition in symbol units.
  • DMRS is mapped to SC-FDMA symbols other than SC-FDMA symbols (final symbols of SRS transmission candidate subframes).
  • the base station 100 demodulates the data signal using DMRS included in the PUSCH transmitted from the terminal 200.
  • DMRS is not punctured in the NB-IoT terminal. Therefore, the base station 100 can perform channel estimation and symbol level synthesis using a sufficient number of DMRS symbols for the received PUSCH.
  • DMRS received signals by symbol level synthesis can be set by appropriately setting the number of divisions N or the number of repetitions R ′. The power improvement effect is obtained.
  • DMRSs are distributed in the time domain, so that it is possible to follow channel fluctuations and compensate for frequency errors. Therefore, according to the present embodiment, it is possible to improve channel estimation accuracy.
  • the base station 100 can accurately perform frequency error estimation or timing detection. it can.
  • the DMRS is avoided from being punctured by controlling the DMRS mapping in the NB-IoT terminal. That is, according to the present embodiment, it is not necessary for base station 100 to change the setting of the SRS subframe with respect to the existing LTE system.
  • the DMRS repetition start position is not limited to the beginning of the PUSCH repetition.
  • terminal 200 may add an offset in units of subframes or slots to the start position of DMRS repetition.
  • Embodiment 3 In Embodiments 1 and 2, it is assumed that the NB-IoT terminal punctures the final symbol of the 14SC-FDMA symbol in the SRS transmission candidate subframe.
  • the number of subframes X per resource unit is X and the number of repetitions R
  • the NB-IoT terminal does not depend on the presence or absence of SRS transmission candidate subframes in the PUSCH transmission section or the number of SRS transmission candidate subframes.
  • PUSCH is transmitted over (X ⁇ R) subframes.
  • the transmission time required for PUSCH repetition is constant.
  • Punuring of DMRS symbols is avoided, but data symbols are punctured. Therefore, particularly when the number of repetitions is small, there is a possibility that characteristics will deteriorate due to missing data symbols.
  • the base station and the terminal according to the present embodiment have the same basic configuration as the base station 100 and the terminal 200 according to the first embodiment, description will be made with reference to FIG. 9 and FIG.
  • the base station 100 notifies the terminal 200 of srs-SubframeConfig as a cell-specific upper layer notification for setting an SRS resource candidate group.
  • the base station 100 performs communication by assigning resource units in the band for NB-IoT to the terminal 200 that is an NB-IoT terminal.
  • the base station 100 determines PUSCH allocation to the NB-IoT terminal.
  • the PUSCH allocation information includes frequency allocation resource information for instructing the NB-IoT terminal, information on the coding scheme and modulation scheme, and the like.
  • the PUSCH allocation information may be notified from the base station 100 to the terminal 200 via a terminal-specific upper layer, or may be notified using a downlink control channel for NB-IoT.
  • the base station 100 notifies the NB-IoT terminal in advance of the repetition count (R) before PUSCH transmission / reception.
  • the repetition count (R) may be notified from the base station 100 to the terminal 200 via a terminal-specific upper layer, or may be notified using a downlink control channel for NB-IoT.
  • the base station 100 notifies the NB-IoT terminal in advance of the number of transmission subcarriers (for example, 1, 3, 6, 12 subcarriers) used by the NB-IoT terminal for PUSCH transmission before PUSCH transmission / reception. .
  • the number of transmission subcarriers may be notified from the base station 100 to the terminal 200 via a higher layer unique to the terminal, or may be notified using a downlink control channel for NB-IoT.
  • the terminal 200 identifies the SRS transmission candidate subframe based on the srs-SubframeConfig notified from the base station 100.
  • the terminal 200 transmits PUSCH for repetition for the number of repetitions (R) notified from the base station 100. At this time, terminal 200 transmits PUSCH using repetition in symbol units.
  • terminal 200 does not map DMRS and data symbols to the final symbol corresponding to the SRS resource candidate among 14SC-FDMA symbols in the SRS transmission candidate subframe. That is, terminal 200 maps DMRSs and data symbols to symbols other than the final symbol of the 14SC-FDMA symbol in the SRS transmission candidate subframe.
  • terminal 200 delays the transmission of PUSCH signals after the final symbol by the amount of the final symbol of the SRS transmission candidate subframe (the amount by which the PUSCH signal is not mapped).
  • terminal 200 does not transmit signals (DMRS and data) in the last symbol of the SRS transmission candidate subframe. In other words, terminal 200 does not puncture either the DMRS symbol or the data symbol.
  • terminal 200 does not transmit a signal in the last symbol (symbol corresponding to the SRS resource candidate) in the SRS transmission candidate subframe, and transmits one SC-FDMA symbol transmitted after the SC-FDMA symbol. Delay minutes.
  • DMRS and data symbols are not mapped to the final symbol of one subframe in terminal 200. That is, terminal 200 does not transmit DMRS and data symbols in the last symbol of one subframe (SRS transmission candidate subframe) in which an existing LTE terminal may transmit SRS. In other words, terminal 200 does not puncture DMRS and data symbols in SRS transmission candidate subframes.
  • terminal 200 performs PUSCH repetition transmission using (14 ⁇ X ⁇ R + N SRS ) SC-FDMA symbols. That is, terminal 200 performs PUSCH repetition transmission using a ceiling ((14 ⁇ X ⁇ R + N SRS ) / 14) subframe.
  • terminal 200 which is an NB-IoT terminal, corresponds to SRS resource candidates for which an LTE terminal may transmit SRS, as in Embodiment 1, when performing PUSCH repetition in symbol units.
  • DMRSs and data signals are mapped to SC-FDMA symbols other than SC-FDMA symbols (final symbols of SRS transmission candidate subframes).
  • the base station 100 demodulates the data signal using DMRS included in the PUSCH transmitted from the terminal 200.
  • the base station 100 uses the NB-IoT terminal as the final symbol of the SRS transmission candidate subframe. It is determined that the signal from is not mapped and transmitted with a delay of one symbol.
  • base station 100 can improve channel estimation and reception quality for the received PUSCH. Therefore, in this Embodiment, the transmission quality with respect to NB-IoT terminal can be improved, suppressing the influence on the existing LTE system to the minimum.
  • the mapping method of data and DMRS to SC-FDMA symbols is arbitrary. Also, in this embodiment, unlike Embodiment 1 or 2, data symbols are not punctured, so that the reception quality at base station 100 does not depend on the number of SRS transmission candidate subframes.
  • the number of repetitions used in the above embodiment the value of parameter X, the number of divisions (N), the number of symbol repetitions (R ′), and the values of parameters defined by srs-SubframeConfig are examples. It is not limited to these.
  • each functional block used in the description of the above embodiment is typically realized as an LSI which is an integrated circuit.
  • the integrated circuit may control each functional block used in the description of the above embodiment, and may include an input and an output. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
  • the name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
  • the method of circuit integration is not limited to LSI, and implementation with a dedicated circuit or a general-purpose processor is also possible.
  • An FPGA Field Programmable Gate Array
  • a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
  • the terminal of the present disclosure includes a repetition unit that performs repetition for mapping in units of symbols over a plurality of subframes on a data signal and a demodulation reference signal (DMRS), and a repetition rate in a plurality of subframes.
  • a signal allocating unit that maps the partitioned DMRS to a symbol other than a symbol corresponding to an SRS resource candidate that is a resource candidate to which a sounding reference signal (SRS) used for measurement of uplink reception quality is mapped;
  • a transmission unit that transmits an uplink signal including a DMRS and a data signal in each subframe.
  • the signal allocating unit continuously maps all DMRSs included in the uplink signal from the first symbol of the plurality of subframes, and punctures the data signal mapped to the symbol corresponding to the SRS resource candidate. To do.
  • the signal allocation unit scatters and maps a plurality of DMRSs included in the uplink signal for each predetermined number of consecutive symbols, and punctures the data signal mapped to the symbols corresponding to the SRS resource candidates .
  • the signal allocation unit maps the DMRS and the data signal to symbols other than the symbol corresponding to the SRS resource candidate among the plurality of subframes, and maps the uplink signal to the symbol corresponding to the SRS resource candidate do not do.
  • a repetition for mapping in units of symbols over a plurality of subframes is performed on a data signal and a demodulation reference signal (DMRS), and the repetition is performed in the plurality of subframes.
  • DMRS is mapped to a symbol other than a symbol corresponding to an SRS resource candidate that is a resource candidate to which a sounding reference signal (SRS) used for measurement of uplink reception quality is mapped, and DMRS and DMRS An uplink signal including a data signal is transmitted.
  • SRS sounding reference signal
  • One embodiment of the present disclosure is useful for a mobile communication system.

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Abstract

Selon la présente invention, une unité de répétition (212) réalise une répétition sur un signal de données et un signal de référence de démodulation (DMRS), la répétition étant destinée à une mise en correspondance répétitive à travers une pluralité de sous-trames au niveau de l'unité de symbole. Sur une pluralité de sous-trames, une unité d'attribution de signal (213) met le DMRS sur lequel la répétition a été réalisée en correspondance avec des symboles autres que des symboles qui correspondent à des ressources de signal de référence de sondage (SRS) candidates qui sont des candidates pour des ressources avec lesquelles un SRS utilisé pour mesurer une qualité de réception de liaison montante est mis en correspondance. Une unité d'émission (216) utilise la pluralité de sous-trames pour émettre un signal de liaison montante (PUSCH) qui comprend le DMRS et le signal de données.
PCT/JP2016/086556 2016-02-05 2016-12-08 Terminal et procédé d'émission WO2017134927A1 (fr)

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Application Number Priority Date Filing Date Title
SG11201805145TA SG11201805145TA (en) 2016-02-05 2016-12-08 Terminal and transmission method
KR1020187015245A KR20180113189A (ko) 2016-02-05 2016-12-08 단말 및 송신 방법
EP16889410.3A EP3413526B1 (fr) 2016-02-05 2016-12-08 Terminal et procédé d'émission
US16/064,971 US10924234B2 (en) 2016-02-05 2016-12-08 Communication apparatus and transmission method for transmitting a demodulation reference signal
RU2018124596A RU2719359C2 (ru) 2016-02-05 2016-12-08 Терминал и способ передачи
CN201680075107.XA CN108432197B (zh) 2016-02-05 2016-12-08 终端及发送方法
JP2017565415A JP6640883B2 (ja) 2016-02-05 2016-12-08 通信装置、通信方法及び集積回路
MX2018007853A MX2018007853A (es) 2016-02-05 2016-12-08 Terminal y metodo de transmision.
EP21179888.9A EP3907952B1 (fr) 2016-02-05 2016-12-08 Station de base et procédé de transmission
BR112018013459-7A BR112018013459B1 (pt) 2016-02-05 2016-12-08 Aparelho de comunicação, método de comunicação e circuito integrado
US17/145,811 US11533210B2 (en) 2016-02-05 2021-01-11 Communication apparatus and transmission method for transmitting a demodulation reference signal
US17/990,422 US11665039B2 (en) 2016-02-05 2022-11-18 Communication apparatus and transmission method for transmitting a demodulation reference signal
US18/302,584 US12015512B2 (en) 2016-02-05 2023-04-18 Communication apparatus and transmission method for transmitting a demodulation reference signal
US18/662,551 US20240297812A1 (en) 2016-02-05 2024-05-13 Communication apparatus and transmission method for transmitting a demodulation reference signal

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US17/145,811 Continuation US11533210B2 (en) 2016-02-05 2021-01-11 Communication apparatus and transmission method for transmitting a demodulation reference signal

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021166440A1 (fr) * 2020-02-21 2021-08-26 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Terminal et procédé de communication

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017134266A1 (fr) * 2016-02-05 2017-08-10 Sony Corporation Dispositifs de communication, équipement d'infrastructure et procédés
EP3413526B1 (fr) 2016-02-05 2021-07-28 Panasonic Intellectual Property Corporation of America Terminal et procédé d'émission
CN109804687B (zh) * 2016-08-10 2023-05-02 株式会社Ntt都科摩 用户终端以及无线通信方法
CN108370460B (zh) * 2017-04-27 2021-12-03 北京小米移动软件有限公司 一种信令传输方法及装置
US11533758B2 (en) 2017-09-27 2022-12-20 Lg Electronics Inc. Method for transmitting and receiving uplink data between terminal and base station in wireless communication system and device supporting same
US11229047B2 (en) * 2018-04-06 2022-01-18 Qualcomm Incorporated Transport block repetition handling for downlink and uplink transmissions
CN110417526B (zh) * 2018-05-11 2020-06-16 华为技术有限公司 一种接收解调参考信号dmrs的方法和通信装置
WO2020019138A1 (fr) * 2018-07-23 2020-01-30 Qualcomm Incorporated Ressources et schémas pour une transmission de liaison montante sans autorisation dans des systèmes emtc/nb-iot
WO2020066232A1 (fr) * 2018-09-27 2020-04-02 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Terminal, et procédé de réception
US11483112B2 (en) * 2020-05-18 2022-10-25 Qualcomm Incorporated Uplink doppler metric estimation based on an uplink reference signal
WO2024036111A1 (fr) * 2022-08-10 2024-02-15 Intel Corporation Techniques de fonctionnement de signal de référence de sondage (srs) avec huit ports

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101617489B (zh) * 2007-03-29 2013-11-06 Lg电子株式会社 在无线通信系统中发送探测参考信号的方法
JP5349308B2 (ja) * 2007-08-08 2013-11-20 パナソニック株式会社 無線送信装置及び無線通信方法
US8804671B2 (en) * 2010-07-15 2014-08-12 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for determining UE mobility status
JP4913896B2 (ja) * 2010-08-16 2012-04-11 株式会社エヌ・ティ・ティ・ドコモ 移動端末装置及び無線通信方法
WO2013005377A1 (fr) * 2011-07-01 2013-01-10 パナソニック株式会社 Appareil récepteur, appareil émetteur, procédé de réglage et procédé de détermination
KR20140053087A (ko) * 2011-07-27 2014-05-07 엘지전자 주식회사 무선통신시스템에서 시퀀스 매핑 방법 및 장치
US20130343477A9 (en) * 2011-11-04 2013-12-26 Research In Motion Limited PUSCH Reference Signal Design for High Doppler Frequency
US8995381B2 (en) * 2012-04-16 2015-03-31 Ofinno Technologies, Llc Power control in a wireless device
CN102710404A (zh) * 2012-06-19 2012-10-03 电子科技大学 低发射功率单载波频分多址系统的传输方法
CN103944662B (zh) * 2013-01-18 2018-10-02 中兴通讯股份有限公司 一种发射上行解调参考信号的方法和系统
US9936486B2 (en) * 2013-02-08 2018-04-03 Lg Electronics Inc. Method and user equipment for reporting demodulation reference signal information and method and base station for receiving demodulation reference signal information
US9585138B2 (en) 2013-03-05 2017-02-28 Sharp Kabushiki Kaisha Base station apparatus, terminal apparatus, integrated circuit, and radio communication method
US20140286255A1 (en) * 2013-03-25 2014-09-25 Samsung Electronics Co., Ltd. Uplink demodulation reference signals in advanced wireless communication systems
US20150089382A1 (en) * 2013-09-26 2015-03-26 Wu-chi Feng Application context migration framework and protocol
EP3107229B1 (fr) * 2014-02-13 2021-06-16 LG Electronics Inc. Procédé et appareil pour émettre un signal de référence de sondage dans un système d'accès sans fil prenant en charge la communication de type machine
US10555309B2 (en) * 2014-07-17 2020-02-04 Lg Electronics Inc. Method and device for transmitting downlink signal in wireless communication system
US10334627B2 (en) * 2014-09-25 2019-06-25 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for enhanced uplink reference signal in listen-before-talk systems
EP3683992A1 (fr) * 2015-04-10 2020-07-22 Panasonic Intellectual Property Corporation of America Station de base, terminal, procédé de réception et procédé de transmission
US10326493B2 (en) * 2015-05-13 2019-06-18 Samsung Electronics Co., Ltd. Control channel transmission and frequency error correction
EP4216482A1 (fr) * 2015-06-22 2023-07-26 LG Electronics Inc. Procédé de transmission de canal de liaison montante et dispositif nb-iot
CN107006010B (zh) * 2015-07-28 2021-11-05 松下电器（美国）知识产权公司 基站、终端、接收方法及发送方法
US10594455B2 (en) * 2015-12-04 2020-03-17 Lg Electronics Inc. Method for transmitting reference signal in V2X communication and apparatus therefor
JP6165276B2 (ja) * 2016-01-08 2017-07-19 株式会社Ｎｔｔドコモ ユーザ端末、無線基地局及び無線通信方法
US10447445B2 (en) * 2016-01-11 2019-10-15 Electronics And Telecommunications Research Institute Device and method for transmitting reference signal
WO2017132841A1 (fr) * 2016-02-02 2017-08-10 Nec Corporation Procédé et appareil de communication basés sur des intervalles de temps d'émission courts dans un système de communication sans fil
EP3411978A1 (fr) * 2016-02-03 2018-12-12 Interdigital Patent Holdings, Inc. Procédés, systèmes et appareil de programmation de sous-trames et de rétroaction de demande de répétition automatique hybride (harq)
EP3413526B1 (fr) * 2016-02-05 2021-07-28 Panasonic Intellectual Property Corporation of America Terminal et procédé d'émission

Non-Patent Citations (13)

* Cited by examiner, † Cited by third party
Title
"Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding (Release 13", 3GPP TS 36.212, December 2015 (2015-12-01)
"Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation (Release 13", 3GPP TS 36.211, December 2015 (2015-12-01)
"Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 13", 3GPP TS 36.213, December 2015 (2015-12-01)
ALCATEL -LUCENT ET AL.: "C overage enhancement for PUSCH", 3GPP TSG-RAN WG1 MEETING #76 RL-140157, 31 January 2014 (2014-01-31), XP050751608 *
ALCATEL -LUCENT ET AL.: "E)PDCCH coverage extension for MTC devices", 3GPP TSG-RAN WG1 MEETING #72BIS RL-130941, 6 April 2013 (2013-04-06), XP050696940 *
HUAWEI, HISILICON, 3GPP TSG RAN WG1 NB-IOT AD- HOC MEETING RL-160183, 13 January 2016 (2016-01-13), XP051064789 *
KOICHIRO KITAGAWA ET AL.: "A simulation study on the impact of MTC coverage enhancement in LTE-Advanced systems", IEICE TECHNICAL REPORT, vol. 115, no. 233, 24 September 2015 (2015-09-24), pages 51 - 55, XP009507915 *
LG ELECTRONICS, DISCUSSION ON PUSCH TRANSMISSION FOR MTC, May 2015 (2015-05-01)
LG ELECTRONICS: "Discussions on PUSCH design for NB-IoT", 3GPP TSG RAN WG1 MEETING NB-IOT AD-HOC RL-160122, 12 January 2016 (2016-01-12), pages 1 - 6, XP051064734 *
PANASONIC, DISCUSSION AND PERFORMANCE EVALUATION ON PUSCH COVERAGE ENHANCEMENT
QUALCOMM, NEW WORK ITEM: NARROWBAND IOT (NBIOT
SAMSUNG, CONSIDERATIONS OF LEGACY SRS IMPACT ON UPLINK TRANSMISSION FROM LOW-COST UE, April 2015 (2015-04-01)
SAMSUNG: "Remaining Issues on NB-PUSCH Design", 3GPP TSG-RAN WG1 MEETING #84 RL-160554, 5 February 2016 (2016-02-05), pages 1 - 3, XP051063845 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021166440A1 (fr) * 2020-02-21 2021-08-26 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Terminal et procédé de communication

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